Hemifacial spasm usually affects one-half of the face. This differentiates it from blepharospasm, which usually involves twitches with both eyes at the same time. When hemifacial spasm affects ...

the palpebral form of essential blepharospasm and hemifacial spasm. Methods: Six patients with the typical form of essential blepharospasm and 4 patients with the palpebral form of essential ...

Hemifacial spasm (HFS) is a neurological disorder manifested by twitching ... They are generally not painful but may impact vision because of involuntary eye closure. In contrast to blepharospasm, a ...